b-hydroxy butyraldehyde is an example of: 

(a) aldol

(b) diol

(c) hemiacetal

(d) acetal

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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A ketone reacted with C2H5MgBr reagent followed by hydrolysis gave a product which on dehydration gives an alken. The alkene on ozonolysis gave diethyl ketone and acetaldehyde. The ketone is:

(a) dimethyl ketone

(b) ethyl methyl ketone

(c) diethyl ketone

(d) ethyl propyl ketone

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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The reaction  produces:

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Treatement of propionaldehyde with dil. NaOH gives:

(a) CH3CH2COOCH2CH2CH3

(b) CH3CH2CHOHCH2CH2CHO

(c) CH3CH2CHOHCH(CH3)CHO

(d) CH3CH2COCH2CH2CHO

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Which of the following will react with water ?

(a) CHCl3

(b) CCl3CHO

(c) CCl4

(d) CH2Cl.CH2Cl

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Among the given compounds, the most susceptible to nucleophile attack at the carbonyl group is:

(a) MeCOCl

(b) MeCHO

(c) MeCOOMe

(d) MeCOOCOMe

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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In a Cannizzaro's reaction, the intermediate that will be best hydride donor is:

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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In the Cannizzaro's reaction given below,

2Ph-CHOOH-Ph-CH2OH + PhCOO-

the slowest step is:

(a) The attack of OH- at the carbonyl group

(b) the transfer of hydride to the carbonyl group

(c) the abstraction of proton from the carboxylic acid

(d) the deprotonation of Ph-CH2OH

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The aldol condensation of acetaldehyde results in hte formation of:

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Wolff-Kishner's reaction is:

(a) reduction of carbonyl compound into hydrocarbons

(b) reduction of carbonyl compound into alcohols

(c) reduction of nitrobenzene into aniline

(d) reduction of carbohydrates to alcohols

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Difficulty Level: